Fix string scan bug

src/parser3.h

@@ -788,7 +788,8 @@ inline PRESERVE_NONE WeaselJsonStatus scan_string_impl(Parser3 *self,
                                                        char *bufEnd) {
   const auto before = buf;
 
-  // Advance buf past normal characters
+  // Advance buf past characters that transition the accept state to itself
+  if (self->strDfa.accept()) {
     for (;;) {
       if (bufEnd - buf < V::lanes) [[unlikely]] {
         break;
@@ -802,6 +803,7 @@ inline PRESERVE_NONE WeaselJsonStatus scan_string_impl(Parser3 *self,
         break;
       }
     }
+  }
 
   buf = (char *)self->strDfa.scan(buf, bufEnd);